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example, the combination of a tranquilizer and alcohol causes depression of the central nervous system equal to the sum of that caused by each individually. In some cases exposure to one chemical can result in a reduction in the effect of another chemical. This is know as antagonism. Most antidotes act as antagonists.
A third type of interaction is potentiation. In this situation, exposure to a chemical which does not have a specific toxic effect makes another chemical more toxic. Synergism occurs when simultaneous exposure to two chemical produces a
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